I am creating a piece of software in WPF that uses VLC 2.1.3 ActiveX v2.
The program can be started multiple times and can play synchronized video on several screens.
I have a master application that communicates with the other programs and tells them what video to play or to jump to a specific location in a video.
Most of the time it works just fine!
Problem
Sometimes when wanting to stop a video, before starting a new one, one of the programs will hang in playlist.stop()
When debugging the C# code on the application that hangs, I can see that playlist.stop() never returns.
Cause
I can't reproduce it every time, but when changing videos fast it will happen eventually.
Below is the C# code that causes problems.
The vlcPlayer variable is the AxVLCPlugin2.
I am using "WindowsFormsHost" to host the ActiveX control in the WPF application.
Code: Select all
private void SetPlayStatus(MediaPlayerCommand _playCommand)
{
if (VlcNotPresent) return;
var oldStaus = GetCurrentStatus(); // what is the play status before we apply the new play status
if (_playCommand == MediaPlayerCommand.Play)
{
if (oldStaus == MediaPlayerCommand.Pause)
{
vlcPlayer.playlist.play();
return;
}
var index = _playlist.IndexOf(currentMediaFile);
if (index < 0) // the playlist will always contain currentMediaFile, but just in case :-)
{
return;
}
vlcPlayer.playlist.playItem(index);
}
else if (oldStaus == MediaPlayerCommand.Play && _playCommand == MediaPlayerCommand.Pause)
{
vlcPlayer.playlist.pause();
}
else if (_playCommand == MediaPlayerCommand.Stop)
{
if (vlcPlayer.input.state == 3 || vlcPlayer.input.state == 4) // Checking if VLC is playing or is paused, added this to try and avoid my problem... but it has no effect
{
vlcPlayer.playlist.stop(); // this is where the application hangs
}
}
}
Can it be a threading issue??
I really hope you clever guys have an answer to this!
Best regards
/Freddie
